You can either connect an MP3 player (I'm assuming), an external hard drive (which would give massive amounts of space,but you'd most likely need a power source), or one of those thumb drives with mp3's on them.

You just plug it in and the radio will allow you to navigate/play the mp3's.

Has there been confirmation that the Camaro will be able to read ACC (m4a) iTunes format?

It won't, Its been confirmed that the USB slot only looks for MP3 files, and when you burn itunes songs to cd it gets converted anyway.

Best bet is to just use your Ipod through the aux jack.

I am more than happy with a USB port, it allows you to buy your own media (see picture below) and rotate songs as you want without having to deal with any encoding/drm cr@p. AND if it gets stolen... its 10 bucks and reload it with your songs from your computer... much better than having to replace your ipod at 200+ a pop...

Just get this for $10 off newegg and it will hold more than you can listen to on a week road trip... (Link to drive...)

It won't, Its been confirmed that the USB slot only looks for MP3 files, and when you burn itunes songs to cd it gets converted anyway.

Best bet is to just use your Ipod through the aux jack.

I am more than happy with a USB port, it allows you to buy your own media (see picture below) and rotate songs as you want without having to deal with any encoding/drm cr@p. AND if it gets stolen... its 10 bucks and reload it with your songs from your computer... much better than having to replace your ipod at 200+ a pop...

Just get this for $10 off newegg and it will hold more than you can listen to on a week road trip... (Link to drive...)

I thought the iPod uses AAC (m4a), but I can understand that it would use mp3 considering that so many devices use that format.